The Undemons have not given up on the idea of "flesh interface." While Futuristdrone Type B9 has been discarded as a failure, its recent upgrade, Type X00021B, is seen as much much more promising.Essentially, Type X00021B integrates itself with its non-undemon host, essentially usurping control of the host's nervous system (or nearest analogue), and forcibly links the host's mind with the Undemon Hivemind.